M. G. Demidova, T. Yu. Podlipskaya, N. O. Shaparenko, M. K. Barakina, V. V. Tatarchuk, A. I. Bulavchenko
{"title":"正癸烷中AOT微乳液中中性红色染料的吸附研究","authors":"M. G. Demidova, T. Yu. Podlipskaya, N. O. Shaparenko, M. K. Barakina, V. V. Tatarchuk, A. I. Bulavchenko","doi":"10.1134/S1061933X24601392","DOIUrl":null,"url":null,"abstract":"<p>Neutral cationic red dye has been sorbed by Polysorb MP from a 0.25 mol/L AOT microemulsion in <i>n</i>-decane at different contents of the aqueous pseudophase. The maximum sorption capacity of the sorbent in the microemulsion is an order of magnitude higher than that in the water phase and amounts to 55 mg/g. A drastic drop in the degree of extraction upon increasing water content in the microemulsion from 1 to 8 vol % and the reversibility of the sorption processes have been revealed. Anionic dyes are not extracted by Polysorb in the same systems. As the water content increases, the zeta-potential of SiO<sub>2</sub> particles decreases from 18 to 1 mV. On the basis of the obtained dependencies, a cation-exchange mechanism has been proposed for the sorption from the microemulsion, with this mechanism involving the exchange of sodium and neutral red dye cations between micelles adsorbed on the surface of particles and micelles contained in the bulk of the microemulsion.</p>","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":"87 2","pages":"192 - 200"},"PeriodicalIF":1.4000,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Sorption of Neutral Red Dye by Enterosorbent Polysorb MP from AOT Microemulsion in n-Decane\",\"authors\":\"M. G. Demidova, T. Yu. Podlipskaya, N. O. Shaparenko, M. K. Barakina, V. V. Tatarchuk, A. I. Bulavchenko\",\"doi\":\"10.1134/S1061933X24601392\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>Neutral cationic red dye has been sorbed by Polysorb MP from a 0.25 mol/L AOT microemulsion in <i>n</i>-decane at different contents of the aqueous pseudophase. The maximum sorption capacity of the sorbent in the microemulsion is an order of magnitude higher than that in the water phase and amounts to 55 mg/g. A drastic drop in the degree of extraction upon increasing water content in the microemulsion from 1 to 8 vol % and the reversibility of the sorption processes have been revealed. Anionic dyes are not extracted by Polysorb in the same systems. As the water content increases, the zeta-potential of SiO<sub>2</sub> particles decreases from 18 to 1 mV. On the basis of the obtained dependencies, a cation-exchange mechanism has been proposed for the sorption from the microemulsion, with this mechanism involving the exchange of sodium and neutral red dye cations between micelles adsorbed on the surface of particles and micelles contained in the bulk of the microemulsion.</p>\",\"PeriodicalId\":521,\"journal\":{\"name\":\"Colloid Journal\",\"volume\":\"87 2\",\"pages\":\"192 - 200\"},\"PeriodicalIF\":1.4000,\"publicationDate\":\"2025-05-14\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Colloid Journal\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://link.springer.com/article/10.1134/S1061933X24601392\",\"RegionNum\":4,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Colloid Journal","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1134/S1061933X24601392","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Sorption of Neutral Red Dye by Enterosorbent Polysorb MP from AOT Microemulsion in n-Decane
Neutral cationic red dye has been sorbed by Polysorb MP from a 0.25 mol/L AOT microemulsion in n-decane at different contents of the aqueous pseudophase. The maximum sorption capacity of the sorbent in the microemulsion is an order of magnitude higher than that in the water phase and amounts to 55 mg/g. A drastic drop in the degree of extraction upon increasing water content in the microemulsion from 1 to 8 vol % and the reversibility of the sorption processes have been revealed. Anionic dyes are not extracted by Polysorb in the same systems. As the water content increases, the zeta-potential of SiO2 particles decreases from 18 to 1 mV. On the basis of the obtained dependencies, a cation-exchange mechanism has been proposed for the sorption from the microemulsion, with this mechanism involving the exchange of sodium and neutral red dye cations between micelles adsorbed on the surface of particles and micelles contained in the bulk of the microemulsion.
期刊介绍：
Colloid Journal (Kolloidnyi Zhurnal) is the only journal in Russia that publishes the results of research in the area of chemical science dealing with the disperse state of matter and surface phenomena in disperse systems. The journal covers experimental and theoretical works on a great variety of colloid and surface phenomena: the structure and properties of interfaces; adsorption phenomena and structure of adsorption layers of surfactants; capillary phenomena; wetting films; wetting and spreading; and detergency. The formation of colloid systems, their molecular-kinetic and optical properties, surface forces, interaction of colloidal particles, stabilization, and criteria of stability loss of different disperse systems (lyosols and aerosols, suspensions, emulsions, foams, and micellar systems) are also topics of the journal. Colloid Journal also includes the phenomena of electro- and diffusiophoresis, electro- and thermoosmosis, and capillary and reverse osmosis, i.e., phenomena dealing with the existence of diffusion layers of molecules and ions in the vicinity of the interface.
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